Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bf39a6d32f7cd73…

MALICIOUS

PDF

72.6 KB Created: 2020-12-30 06:33:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 732c9ad07efc1ef0a769ed795f13c00b SHA-1: 11689fb2fe650181a8f3d517a69653e371336a62 SHA-256: 5bf39a6d32f7cd73ced8f33a278895c923b0bf5ee1c1c14053dd0128087b6488
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafftec.ru/123?utm_term=calvino+why+read+the+classics PDF link annotation
    • https://cdn.sqhk.co/visukodo/Yhdigif/lanozerir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491665/normal_5fc732a765430.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/bcbs_texas_medication_prior_authorization_form.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/kaun_banega_crorepati_questions_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/66533097322.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/21809576707.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/tusopubofovapovag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e35dc45-99d0-4334-b27c-977afbaa258b/6258722462.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/shazam_apk_4._2._2.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/latex_overleaf_thesis_template.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC678 5184 bytes
SHA-256: 88633d27124be9f27584e339fb680236d7ce6c3d4820e33f3944653266b4e375
font_01_sfnt_off0000d828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD828 11312 bytes
SHA-256: 871199fb8ab9cbfc4bb2cb026ef13a9d62249701543df416a194f8a470b261ae
font_02_sfnt_off0000fe11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE11 16412 bytes
SHA-256: f764eb27892eeff3874e3de6751baaf106d9e6e4089b854ad2492f40e3f34a73